COSMOS Chapter 6 Solution 75 - Edubirdie

University:
Michigan State University
Course:
ERG 160 | Success in Science, Technology, Engineering, and Mathematics
Academic year:

2022
Views:

115

Pages:

1
Author:

Campbell Wagner

COSMOS: Complete Online Solutions Manual Organization System Chapter 6, Solution 75. Structure (a): Rigid truss with r = 3, m = 14, n = 8 so r + m = 17 > 2n = 16 so completely constrained but indeterminate ! Structure (b): Simple truss (start with ABC and add joints alphabetically), with r = 3, m = 13, n = 8 so r + m = 16 = 2n so completely constrained and determinate ! Structure (c): Simple truss with r = 3, m = 13, n = 8 so r + m = 16 = 2n, but horizontal reactions ( Ax and Dx ) are collinear so cannot be resolved by any equilibrium equation. ∴ structure is improperly constrained ! Vector Mechanics for Engineers: Statics and Dynamics, 8/e, Ferdinand P. Beer, E. Russell Johnston, Jr., Elliot R. Eisenberg, William E. Clausen, David Mazurek, Phillip J. Cornwell © 2007 The McGraw-Hill Companies.

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